You love taking swipes Anwar dont you?
BTW the cub is not a cub, just look at the tail shape and the windows, may be cub look alike
It looks like more of other L series from US used during WW II

Thanks for the review of RCGF,
I have a 17 cc RCSC, I guees they are all mfg at the same factory. You review gives me confidence to search for bird for the engine

Captain - It is a fairly recently acquired skill, and I had couple of true masters as teachers

Joking aside, I would rather have you look at this as me (a relative newcomer) having learned something from someone who knows what he is talking about... yet proves every once in a while that he is also only human (like the rest of us) by the way the information is delivered

Regarding the engine, there is a lot of interest on our field towards these, especially the 15cc one. Some people seemed to be astonished by the availability and performance at this size. I will keep on adding anything of significance here. 

Interesting page on tuning Walbro carbs.

http://www.geistware.com/rcmodeling/glowpower/gas_engine_tune_1.htm

What caught my attention is that the "low needle has no effect on idle", it is done by a separate idle screw.  It looks like we need to look at the "low" needle as more like the "middle" needle.

Wow... now they have the regular mount versions also !  Pretty much a drop-in replacement now !

http://www.zjrcgf.com/productdetail.asp?id=115

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=15381